Safety elevator device.



M. ELYOVSZKY. SAFETY ELEVATOR DEVICE. APPLICATION IILED 1130.24, 1910.

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rnnoi JVIIHALJ' ELYOVSZKY, OF ERIE, PENNSYLVANIA.

SAFETY ELEVATOR DEVICE.

Specification of Letters Patent.

Patented Mar. '7, 1911.

Application filed December 24, 1910. Serial No. 599,162.

To all whom "it may concern:

Be it known that I, Miriam Enrovsznr, a subject of the King of Hungary,residing at Erie, in the county of Erie and State of Pennsylvania, haveinvented certain new and useful Improvements in Safety Elevator Devices,of which the following is a specification, reference being had thereinto the ac companying drawing.

This invention relates to a safety elevator device, and the object ofthe invention is to furnish a cable hoisted elevator cage with positiveand reliable means in a manner as will be hereinafter set forth forpreventing a sudden descent of the elevator *ago due to a breaking ofthe hoisting cable, the mechanism employed for this purpose being simplein construction, durable, applicable to various types of cable hoistedelevators, and highly eliicient for the purposes for which it isintended.

I attain the above object by a mechanical construction that will behereinafter specifically described and then claimed, and reference willnow he had to the drawing, wherein:

Figure 1 is a front elevation of a portion of an elevator shaft andelevator constructed in accordance with this invention, and Fig. 2 is ahorizontal sectional View of a portion of the same.

In the drawing the reference numerals 1 and 2 denote vertical frames ofan elevator shaft and these frames are provided throughout their lengthwith equally spaced stops or projections 8.

Movable between the frames 1 and 2 is an elevator cage 4 comprising afloor 5 side frames 6 and a top beam 7, to which is attached by means ofan eye-bolt 8 and a nut 9 a cable 10. The cable 10 is adapted to passover a revoluble sheave or hoisting drum 11 and a sheave 12 revolublysupported by the frame 2. Attached to the end of the cable 10 is acounter balance weight 13.

Connected to the floor 5 of the elevator cage 4 by bolts 14 and nuts 15is a casing comprising a noblong structure 16 provided with verticalbarrels 17 to receive the bolts 14. The ends of the structure 16 arereduced, as at 18, and provided with housings 19, these housings beingsecured to the floor 5 by bolts 20 and nuts 21. The oblong structure 16has the ends thereof provided with spring compartments 22 and a centralcompartment 23.

Extending through the housings 19, compartments 22, into the compartment23 are locking bars 24: and 25 having the inner ends thereof off-set, asat 26, and provided with confronting racks 27 adapted to mesh with apinion 28 mounted upon a vertical shaft 29 journaled in the casing oroblong structure 16, said shaft extending upwardly into an opening 29provided therefor in the floor 5, the upper end of the shaft having arectangular shank 30 to receive the socket end 31 of the crank 32, thecrank being detachably mounted upon the shank 30 and employed forrestoring the locking bars 2i and to their normal position after havingbeen released. k

Mounted upon the locking bars 2% and 25 within the compartments 22 areheads 33 and encircling said bars between the heads and the inner endsof the compartments are coiled compression springs 34 normally retainedunder tension and adapted when released to shift the locking bars 24 and25 outwardly whereby they will engage the stops 3 of the frames 1 and 2.

The housing 19 at the outer end of the locking bar 24 is provided with arecess and movably mounted in said recess is a beveled latch 36 adaptedto engage in a notch 37 provided therefor in the upper side of the bar24-. The beveled latch 36 is detachably connected to a rod 38 extendingupwardly through the recess the housing 19 and the floor 5 of theelevator cage 4.

Encircling the rod 88 within the recess is a compression spring 39adaptcdto normally retain the latch 36 within the notch 37 of the barThe upper end of the rod 38 is provided with an eye 40 and connected tosaid eye is the lower end of a cable 11 passing upwardly through anopening 4-2 provided therefor in the beam 7, the cable 11 passing over asheave 4:3 rcvolubly supported by the vertical frame 2 adjacent to thesheave 12, the end of the cable ll being attached to an eye 14, carriedby the lower end of the counter balance weight 13.

Should the hoisting cable 10 break and release the counter balanceweight 13, said weight through the medium of the cable ll innnediatelywithdraws the latch 36 from the notch 37 of the bar 2%, thereby rcleasing the tension of the springs 84 and allowing said springs toshiftthe bars 241. and 25 outwardly to engage the stops 3 of the frames1 and 2. A sudden descent of the elevator cage is thereby prevented, andafter the cable 10 has been repaired the locking bars 2% and 25 can berestored to their normal position by placing the crank 32 upon the upperend of the shaft 29 thereby rotating the latter, whereby the bars 24 and25 can be retracted and immediately upon the latch engaging in the notch3'7, both of said bars will be held until released by withdrawal of thelatch.

It is thought that the operation and utility of the safety elevatordevice will be ap parent 'ithout further description, and while in thedrawings there is illustrated a preferred embodiment of the invention,it is to be understood that the structural elements thereof aresusceptible to such changes as fall within the scope of the appendedclaim.

hat I claim, is:

In a safety elevator device, the combination with vertical frames havingstops, an elevator cage movable between said frames, a hoisting cableattached to said cage, and a counter balance weight carried by saidcable, of a casing suspended beneath the floor of sa1d cage, housingscarried by the ends of sa1d casing, locking bars slidably mounted insaid housings and extending 1 ing and adapted to shift said bars toengage the stops of said frame when released by said latch, and meansincluding a vertical shaft, a pinion and racks adapted to restore saidbars to their normal position, substantially as described.

In testimony whereof I atfix my signature in the presence of twowitnesses.

MIHALJ ELYO'VSZKY.

Witnesses HERMAN STAHL, HUGO E. STAiiL.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. C.

